An honored Roman commander in Tripoli of Phoenicia, he was described as being 'of great physical stature, powerful, strong and bold in battle'. When it was learned that he was a Christian and had given grain to the poor from the imperial storehouse, the governor Hadrian, a great persecutor of Christians, sent Hypatius, a military commander, and Theodoulus, a soldier, along with some others to arrest him. On the way Hypatius fell gravely ill with a fever, and the company had to delay its mission. One night an angel of the Lord appeared to Hypatius and said, 'If you desire to be healed, you and your soldiers must cry to heaven three times: "O God of Leontius, help me!"'. Hypatius told his comrades of his vision, and when they all cried out as instructed Hypatius was instantly healed. Hypatius and Theodoulos then went on ahead of the other soldiers and found Leontius. Leontius received them hospitably and offered them refreshment. As they rested in his house, he proclaimed his faith in Christ and their hearts began to burn within them. While Leontius was still speaking, a bright cloud descended upon the two soldiers and shed dew on them while Leontius said 'In the name of the All-holy Trinity: Father, Son and Holy Spirit.' Thus were they baptized by the Holy Spirit Himself.